Apparatus and method for reprocessing a medical device

ABSTRACT

An apparatus and method for reprocessing a medical device includes a decontamination basin, a first flush conduit, a second flush conduit, and a manifold. The first and second flush conduits have respective first and second coupling ports configured to fluidly connect to the medical device positioned within the decontamination basin. The manifold is fluidly connected to the first and second flush conduits and configured to distribute the fluid received therein accordingly. The apparatus also includes a first valve, a second valve, and a primary pump configured to discharge the fluid into the manifold at a predetermined supply flow rate. The first and second valve are positioned respectively in the first and second flush conduits for balancing the respective flow rates discharged therefrom at a first predetermined conduit flow rate and a second predetermined conduit flow rate.

BACKGROUND

The below discussion relates to the reprocessing (i.e., decontamination)of endoscopes and other instruments that are used in medical procedures.In particular, the below discussion relates to an apparatus and a methodthat may be used to reprocess a medical device, such as an endoscope,after the medical device has been used in a first medical procedure,such that the medical device may be safely used in a subsequent medicalprocedure. While the below discussion will speak mainly in terms of anendoscope, it should be understood that the discussion may also equallyapply to certain other medical devices.

An endoscope may have one or more working channels or lumens extendingalong at least a portion of the length of the endoscope. Such channelsmay be configured to provide a pathway for passage of other medicaldevices, etc., into an anatomical region within a patient. Thesechannels may be difficult to clean and/or disinfect using certainprimitive cleaning and/or disinfecting techniques. Thus, the endoscopemay be placed in a reprocessing system that is particularly configuredto clean endoscopes, including the channels within endoscopes. Such anendoscope reprocessing system may wash and disinfect the endoscope. Suchan endoscope reprocessing system may include a basin that is configuredto receive the endoscope, with a pump that flows cleaning fluids overthe exterior of the endoscope within the basin. The system may alsoinclude ports that couple with the working channels of the endoscope andassociated pumps that flow cleaning fluids through the working channelsof the endoscope. The process executed by such a dedicated endoscopereprocessing system may include a detergent washing cycle, followed by arinsing cycle, followed by a sterilization or disinfection cycle,followed by another rinsing cycle. The sterilization or disinfectioncycle may employ disinfection solution and water rinses. The process mayoptionally include an alcohol flush to aid displacement of water. Arinsing cycle may be followed by an air flush for drying and storage.

Examples of systems and methods that may be used to reprocess a usedendoscope are described in U.S. Pat. No. 6,986,736, entitled “AutomatedEndoscope Reprocessor Connection with Integrity Testing,” issued Jan.17, 2006, the disclosure of which is incorporated by reference herein;U.S. Pat. No. 7,479,257, entitled “Automated Endoscope ReprocessorSolution Testing,” issued Jan. 20, 2009, the disclosure of which isincorporated by reference herein; U.S. Pat. No. 7,686,761, entitled“Method of Detecting Proper Connection of an Endoscope to an EndoscopeReprocessor,” issued Mar. 30, 2010, the disclosure of which isincorporated by reference herein; and U.S. Pat. No. 8,246,909, entitled“Automated Endoscope Reprocessor Germicide Concentration MonitoringSystem and Method,” issued Aug. 21, 2012, the disclosure of which isincorporated by reference herein. An example of a commercially availableendoscope reprocessing system is the EVOTECH® Endoscope Cleaner andReprocessor (ECR) by Advanced Sterilization Products of Irvine, Calif.

While a variety of systems and methods have been made and used toreprocess medical devices, it is believed that no one prior to theinventor(s) has made or used the technology as described herein.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate embodiments of the invention,and, together with the general description of the invention given above,and the detailed description of the embodiments given below, serve toexplain the principles of the present invention.

FIG. 1 depicts a front elevational view of a first exemplaryreprocessing system;

FIG. 2 depicts a schematic diagram of the reprocessing system of FIG. 1,with only a single decontamination basin shown for clarity;

FIG. 3 depicts a cross-sectional side view of proximal and distalportions of an endoscope that may be decontaminated using thereprocessing system of FIG. 1;

FIG. 4 depicts a schematic diagram of a second exemplary reprocessingsystem;

FIG. 5 depicts a schematic diagram of a third exemplary reprocessingsystem;

FIG. 6 depicts a schematic diagram of a fourth exemplary reprocessingsystem;

FIG. 7 depicts a schematic diagram of a fifth exemplary reprocessingsystem; and

FIG. 8 depicts a schematic diagram of a sixth exemplary reprocessingsystem.

The drawings are not intended to be limiting in any way, and it iscontemplated that various embodiments of the invention may be carriedout in a variety of other ways, including those not necessarily depictedin the drawings. The accompanying drawings incorporated in and forming apart of the specification illustrate several aspects of the presentinvention, and together with the description serve to explain theprinciples of the invention; it being understood, however, that thisinvention is not limited to the precise arrangements shown.

DETAILED DESCRIPTION

The following description of certain examples of the technology shouldnot be used to limit its scope. Other examples, features, aspects,embodiments, and advantages of the technology will become apparent tothose skilled in the art from the following description, which is by wayof illustration, one of the best modes contemplated for carrying out thetechnology. As will be realized, the technology described herein iscapable of other different and obvious aspects, all without departingfrom the technology. Accordingly, the drawings and descriptions shouldbe regarded as illustrative in nature and not restrictive.

It is further understood that any one or more of the teachings,expressions, embodiments, examples, etc. described herein may becombined with any one or more of the other teachings, expressions,embodiments, examples, etc. that are described herein. Thefollowing-described teachings, expressions, embodiments, examples, etc.should therefore not be viewed in isolation relative to each other.Various suitable ways in which the teachings herein may be combined willbe readily apparent to those of ordinary skill in the art in view of theteachings herein. Such modifications and variations are intended to beincluded within the scope of the claims.

I. Exemplary Medical Device Reprocessing Apparatus

FIGS. 1-2 show an exemplary reprocessing system (2) that may be used todecontaminate endoscopes and other medical devices that include channelsor lumens formed therethrough. System (2) of this example generallyincludes a first station (10) and a second station (12). Stations (10,12) are at least substantially similar in all respects to provide forthe decontamination of two different medical devices simultaneously orin series. First and second decontamination basins (14 a, 14 b) receivethe contaminated devices. Each basin (14 a, 14 b) is selectively sealedby a respective lid (16 a, 16 b). In the present example, lids (16 a, 16b) cooperate with respective basins (14 a, 14 b) to provide amicrobe-blocking relationship to prevent the entrance of environmentalmicrobes into basins (14 a, 14 b) during decontamination operations. Byway of example only, lids (16 a, 16 b) may include a microbe removal orHEPA air filter formed therein for venting.

A control system (20) includes one or more microcontrollers, such as aprogrammable logic controller (PLC), for controlling decontamination anduser interface operations. Although one control system (20) is shownherein as controlling both decontamination stations (10, 12), thoseskilled in the art will recognize that each station (10, 12) can includea dedicated control system. A visual display (22) displaysdecontamination parameters and machine conditions for an operator, andat least one printer (24) prints a hard copy output of thedecontamination parameters for a record to be filed or attached to thedecontaminated device or its storage packaging. It should be understoodthat printer (24) is merely optional. In some versions, visual display(22) is combined with a touch screen input device. In addition or in thealternative, a keypad and/or other user input feature is provided forinput of decontamination process parameters and for machine control.Other visual gauges (26) such as pressure meters and the like providedigital or analog output of decontamination or medical device leaktesting data.

FIG. 2 diagrammatically illustrates just one decontamination station(10) of reprocessing system (2), but those skilled in the art willrecognize that decontamination station (12) may be configured andoperable just like decontamination station (10). It should also beunderstood that reprocessing system (2) may be provided with just onesingle decontamination station (10, 12) or more than two decontaminationstations (10, 12).

Decontamination basin (14 a) receives an endoscope (200) (see FIG. 3) orother medical device therein for decontamination. Any internal channelsof endoscope (200) are connected with flush conduits, such as flushlines (30). Each flush line (30) is connected to an outlet of acorresponding pump (32), such that each flush line (30) has a dedicatedpump (32) in this example. Pumps (32) of the present example compriseperistaltic pumps that pump fluid, such as liquid and air, through theflush lines (30) and any internal channels of endoscope (200).Alternatively, any other suitable kind of pump(s) may be used. In thepresent example, pumps (32) can either draw liquid from basin (14 a)through a filtered drain (34) and a valve (S1); or draw decontaminatedair from an air supply system (36) through a valve (S2). Air supplysystem (36) of the present example includes a pump (38) and a microberemoval air filter (40) that filters microbes from an incoming airstream.

A pressure switch or sensor (42) is in fluid communication with eachflush line (30) for sensing excessive pressure in the flush line. Anyexcessive pressure or lack of flow sensed may be indicative of a partialor complete blockage (e.g., by bodily tissue or dried bodily fluids) inan endoscope (200) channel to which the relevant flush line (30) isconnected. The isolation of each flush line (30) relative to the otherflush lines (30) allows the particular blocked channel to be easilyidentified and isolated, depending upon which sensor (42) sensesexcessive pressure or lack of flow.

Basin (14 a) is in fluid communication with a water source (50), such asa utility or tap water connection including hot and cold inlets, and amixing valve (52) flowing into a break tank (56). A microbe removalfilter (54), such as a 0.2 μm or smaller absolute pore size filter,decontaminates the incoming water, which is delivered into break tank(56) through the air gap to prevent backflow. A sensor (59) monitorsliquid levels within basin (14 a). An optional water heater (53) can beprovided if an appropriate source of hot water is not available. Thecondition of filter (54) can be monitored by directly monitoring theflow rate of water therethrough or indirectly by monitoring the basinfill time using a float switch or the like. When the flow rate dropsbelow a select threshold, this indicates a partially clogged filterelement that requires replacement.

A basin drain (62) drains liquid from basin (14 a) through an enlargedhelical tube (64) into which elongated portions of endoscope (200) canbe inserted. Drain (62) is in fluid communication with a recirculationpump (70) and a drain pump (72). Recirculation pump (70) recirculatesliquid from basin drain (62) to a spray nozzle assembly (60), whichsprays the liquid into basin (14 a) and onto endoscope (200). A coarsescreen (71) and a fine screen (73) filter out particles in therecirculating fluid. Drain pump (72) pumps liquid from basin drain (62)to a utility drain (74). A level sensor (76) monitors the flow of liquidfrom pump (72) to utility drain (74). Pumps (70, 72) can besimultaneously operated such that liquid is sprayed into basin (14 a)while basin (14 a) is being drained, to encourage the flow of residueout of basin (14 a) and off of endoscope (200). Of course, a single pumpand a valve assembly could replace dual pumps (70, 72).

An inline heater (80), with temperature sensors (82), upstream ofrecirculation pump (70), heats the liquid to optimum temperatures forcleaning and/or disinfection. A pressure switch or sensor (84) measurespressure downstream of circulation pump (70). In some variations, a flowsensor is used instead of pressure sensor (84), to measure fluid flowdownstream of circulation pump (70). Detergent solution (86) is meteredinto the flow downstream of circulation pump (70) via a metering pump(88). A float switch (90) indicates the level of detergent (86)available. Disinfectant (92) is metered into the flow upstream ofcirculation pump (70) via a metering pump (94). To more accurately meterdisinfectant (92), a dispensing pump (94) fills a metering pre-chamber(96) under control of a fluid level switch (98) and control system (20).By way of example only, disinfection solution (92) may comprise CIDEX©Activated Glutaraldehyde Solution by Advanced Sterilization Products ofIrvine, Calif. By way of further example only, disinfection solution(92) may comprise ortho-phthalaldehyde (OPA). By way of further exampleonly, disinfection solution (92) may comprise peracetic acid (PAA).

Some endoscopes (200) include a flexible outer housing or sheathsurrounding the individual tubular members and the like that form theinterior channels and other parts of endoscope (200). This housingdefines a closed interior space, which is isolated from patient tissuesand fluids during medical procedures. It may be important that thesheath be maintained intact, without cuts or other holes that wouldallow contamination of the interior space beneath the sheath. Therefore,reprocessing system (2) of the present example includes means fortesting the integrity of such a sheath. In particular, an air pump(e.g., pump (38) or another pump (110)) pressurizes the interior spacedefined by the sheath of endoscope (200) through a conduit (112) and avalve (S5). In the present example, a HEPA or other microbe-removingfilter (113) removes microbes from the pressurizing air. A pressureregulator (114) prevents accidental over pressurization of the sheath.Upon full pressurization, valve (S5) is closed and a pressure sensor(116) looks for a drop in pressure in conduit (112), which wouldindicate the escape of air through the sheath of endoscope (200). Avalve (S6) selectively vents conduit (112) and the sheath of endoscope(200) through an optional filter (118) when the testing procedure iscomplete. An air buffer (120) smoothes out pulsation of pressure fromair pump (110).

In the present example, each station (10, 12) also contains a drip basin(130) and spill sensor (132) to alert the operator to potential leaks.

An alcohol supply (134), controlled by a valve (S3), can supply alcoholto channel pumps (32) after rinsing steps, to assist in removing waterfrom channels (210, 212, 213, 214, 217, 218) of endoscope (200).

Flow rates in supply lines (30) can be monitored via channel pumps (32)and pressure sensors (42). If one of pressure sensors (42) detects toohigh a pressure, the associated pump (32) is deactivated. The flow rateof pump (32) and its activated duration time provide a reasonableindication of the flow rate in an associated line (30). These flow ratesare monitored during the process to check for blockages in any of thechannels of endoscope (200). Alternatively, the decay in the pressurefrom the time pump (32) cycles off can also be used to estimate the flowrate, with faster decay rates being associated with higher flow rates.

A more accurate measurement of flow rate in an individual channel may bedesirable to detect more subtle blockages. To that end, a metering tube(136) having a plurality of level indicating sensors (138) fluidlyconnects to the inputs of channel pumps (32). In some versions, areference connection is provided at a low point in metering tube (136)and a plurality of sensors (138) are arranged vertically above thereference connection. By passing a current from the reference pointthrough the fluid to sensors (138), it can be determined which sensors(138) are immersed and therefore determine the level within meteringtube (136). In addition or in the alternative, any other suitablecomponents and techniques may be used to sense fluid levels. By shuttingvalve (S1) and opening a vent valve (S7), channel pumps (32) drawexclusively from metering tube (136). The amount of fluid being drawncan be very accurately determined based upon sensors (138). By runningeach channel pump (32) in isolation, the flow therethrough can beaccurately determined based upon the time and the volume of fluidemptied from metering tube (136).

In addition to the input and output devices described above, all of theelectrical and electromechanical devices shown are operatively connectedto and controlled by control system (20). Specifically, and withoutlimitation, switches and sensors (42, 59, 76, 84, 90, 98, 114, 116, 132136) provide input (I) to microcontroller (28), which controls thecleaning and/or disinfection cycles and other machine operations inaccordance therewith. For example, microcontroller (28) includes outputs(O) that are operatively connected to pumps (32, 38, 70, 72, 88, 94,100, 110), valves (S1, S2, S3, S5, S6, S7), and heater (80) to controlthese devices for effective cleaning and/or disinfection cycles andother operations.

As shown in FIG. 3, endoscope (200) has a head part (202). Head part(202) includes openings (204, 206) formed therein. During normal use ofendoscope (200), an air/water valve (not shown) and a suction valve (notshown) are arranged in openings (204, 206). A flexible insertion tube(208) is attached to head part (202). A combined air/water channel (210)and a combined suction/biopsy channel (212) are accommodated ininsertion tube (208). A separate air channel (213) and water channel(214) are also arranged in head part (202) and merge into air/waterchannel (210) at the location of a joining point (216). It will beappreciated that the term “joining point” as used herein refers to anintersecting junction rather than being limited to a geometrical pointand, the terms may be used interchangeably. Furthermore, a separatesuction channel (217) and biopsy channel (218) are accommodated in headpart (202) and merge into suction/biopsy channel (212) at the locationof a joining point (220).

In head part (202), air channel (213) and water channel (214) open intoopening (204) for the air/water valve (not shown). Suction channel (217)opens into opening (206) for the suction valve (not shown). Furthermore,a flexible feed hose (222) connects to head part (202) and accommodateschannels (213′, 214′, 217′), which are connected to air channel (213),water channel (214), and suction channel (217) via respective openings(204, 206). In practice, feed hose (222) may also be referred to as thelight-conductor casing. The mutually connecting air channels (213, 213′)will collectively be referred to below as air channel (213). Themutually connecting water channels (214, 214′) will collectively bereferred to below as water channel (214). The mutually connectingsuction channels (217, 217′) will collectively be referred to below assuction channel (217). A connection (226) for air channel (213),connections (228, 228 a) for water channel (214), and a connection (230)for suction channel (217) are arranged on the end section (224) (alsoreferred to as the light conductor connector) of flexible hose (222).When the connection (226) is in use, connection (228 a) is closed off. Aconnection (232) for biopsy channel (218) is arranged on head part(202).

A channel separator (240) is shown inserted into openings (204, 206).Channel separator (240) comprises a body (242) and plug members (244,246), which occlude respective openings (204, 206). A coaxial insert(248) on plug member (244) extends inwardly of opening (204) andterminates in an annular flange (250), which occludes a portion ofopening (204) to separate channel (213) from channel (214). Byconnecting lines (30) to openings (226, 228, 228 a, 230, 232), liquidfor cleaning and disinfection can be flowed through endoscope channels(213, 214, 217, 218) and out of a distal tip (252) of endoscope (200)via channels (210, 212). Channel separator (240) ensures that suchliquid flows all the way through endoscope (200) without leaking out ofopenings (204, 206); and isolates channels (213, 214) from each other sothat each channel (213, 214) has its own independent flow path. One ofskill in the art will appreciate that various endoscopes havingdiffering arrangements of channels and openings may requiremodifications to channel separator (240) to accommodate such differenceswhile occluding ports in head (202) and keeping channels separated fromeach other so that each channel can be flushed independently of theother channels. Otherwise, a blockage in one channel might merelyredirect flow to a connected unblocked channel.

A leakage port (254) on end section (224) leads into an interior portion(256) of endoscope (200) and is used to check for the physical integritythereof, namely to ensure that no leakage has formed between any of thechannels and the interior (256) or from the exterior to the interior(256).

II. Exemplary Medical Device Reprocessing Method

In an exemplary use of reprocessing system (2) as shown in FIGS. 1-3, anoperator may start by actuating a foot pedal (not shown) to open basinlid (16 a). Each lid (16 a, 16 b) may have its own foot pedal. In someversions, once pressure is removed from the foot pedal, the motion oflid (16 a, 16 b) stops. With lid (16 a) open, the operator insertsinsertion tube (208) of endoscope (200) into helical circulation tube(64). End section (224) and head section (202) of endoscope (200) aresituated within basin (14 a), with feed hose (222) coiled within basin(14 a) with as wide a diameter as possible. Next, flush lines (30) areattached to respective endoscope openings (226, 228, 228 a, 230, 232).Air line (112) is also connected to a leakage port (254), which may alsobe referred to herein as a connector. In some versions, flush lines (30)are color coded, and guide located on station (10) provides a referencefor the color-coded connections.

Depending on the customer-selectable configuration, control system (20)may prompt the operator to enter a user code, patient ID, endoscopecode, and/or specialist code. This information may be entered manually(e.g., through touch screen (22)), automatically (e.g., by using anattached barcode wand), or in any other suitable fashion. With theinformation entered (if required), the operator may then close lid (16a). In some versions, closing lid (16 a) requires the operator to pressa hardware button and a touch-screen (22) button simultaneously toprovide a fail-safe mechanism for preventing the operator's hands frombeing caught or pinched by the closing basin lid (16 a). If either thehardware button or software button is released while lid (16 a) is inthe process of closing, the motion of lid (16 a) stops.

Once lid (16 a) is closed, the operator presses a button on touch-screen(22) to begin the washing/disinfection process. At the start of thewashing/disinfection process, air pump (38) is activated and pressurewithin the body of endoscope (200) is monitored. When pressure reaches apredetermined level (e.g., 250 mbar), pump (38) is deactivated, and thepressure is allowed to stabilize for a certain stabilization period(e.g., 6 seconds). If pressure has not reached a certain pressure (e.g.,250 mbar) in a certain time period (e.g., 45 seconds), the program isstopped and the operator is notified of a leak. If pressure drops belowa threshold (e.g., less than 100 mbar) during the stabilization period,the program is stopped and the operator is notified of the condition.Once the pressure has stabilized, the pressure drop is monitored overthe course of a certain duration (e.g., 60 seconds). If pressure drop isfaster than a predetermined rate (e.g., more than 10 mbar within 60seconds), the program is stopped and the operator is notified of thecondition. If the pressure drop is slower than a predetermined rate(e.g., less than 10 mbar in 60 seconds), reprocessing system (2)continues with the next step. A slight positive pressure is held withinthe body of endoscope (200) during the rest of the process to preventfluids from leaking in.

A second leak test checks the adequacy of connection to the variousports (226, 228, 228 a, 230, 232) and the proper placement of channelseparator (240). A quantity of water is admitted to basin (14 a) so asto submerge the distal end of endoscope (200) in helical tube (64).Valve (S1) is closed and valve (S7) opened; and pumps (32) are run inreverse to draw a vacuum and to ultimately draw liquid into endoscopechannels (210, 212). Pressure sensors (42) are monitored to make surethat the pressure in any one channel (210, 212) does not drop and/orraise by more than a predetermined amount in a given time frame. If itdoes, it likely indicates that one of the connections was not madecorrectly and air is leaking into channel (210, 212). In any event, inthe presence of an unacceptable pressure drop, control system (20) willcancel the cycle and indicate a likely faulty connection, preferablywith an indication of which channel (210, 212) failed.

In the event that the leak tests are passed, reprocessing system (2)continues with a pre-rinse cycle. The purpose of this step is to flushwater through channels (210, 212, 213, 214, 217, 218) to remove wastematerial prior to washing and disinfecting endoscope (200). To initiatethe pre-rinse cycle, basin (14 a) is filled with filtered water and thewater level is detected by pressure sensor (59) below basin (14 a). Thewater is pumped via pumps (32) through the interior of channels (210,212, 213, 214, 217, 218), directly to drain (74). This water is notrecirculated around the exterior surfaces of endoscope (200) during thisstage. As the water is being pumped through channels (210, 212, 213,214, 217, 218), drain pump (72) is activated to ensure that basin (14 a)is also emptied. Drain pump (72) will be turned off when drain switch(76) detects that the drain process is complete. During the drainingprocess, sterile air is blown via air pump (38) through all endoscopechannels (210, 212, 213, 214, 217, 218) simultaneously, to minimizepotential carryover.

Once the pre-rinse cycle is complete, reprocessing system (2) continueswith a wash cycle. To begin the wash cycle, basin (14 a) is filled withwarm water (e.g., approximately 35° C.). Water temperature is controlledby controlling the mix of heated and unheated water. The water level isdetected by pressure sensor (59). Reprocessing system (2) then addsenzymatic detergent to the water circulating in reprocessing system (2)by means of peristaltic metering pump (88). The volume is controlled bycontrolling the delivery time, pump speed, and inner diameter of thetubing of pump (88). Detergent solution (86) is actively pumpedthroughout the internal endoscope channels (210, 212, 213, 214, 217,218) and over the outer surface of endoscope (200) for a predeterminedtime period (e.g., from one to five minutes, or more particularly aboutthree minutes), by channel pumps (32) and external circulation pump(70). Inline heater (80) keeps the temperature at a predeterminedtemperature (e.g., approximately about 35° C.).

After detergent solution (86) has been circulating for a certain periodof time (e.g., a couple of minutes), the flow rate through channels(210, 212, 213, 214, 217, 218) is measured. If the flow rate through anychannel (210, 212, 213, 214, 217, 218) is less than a predetermined ratefor that channel (210, 212, 213, 214, 217, 218), the channel (210, 212,213, 214, 217, 218) is identified as blocked, the program is stopped,and the operator is notified of the condition. Peristaltic pumps (32)are run at their predetermined flow rates and cycle off in the presenceof unacceptably high pressure readings at the associated pressure sensor(42). If a channel (210, 212, 213, 214, 217, 218) is blocked, thepredetermined flow rate will trigger pressure sensor (42), indicatingthe inability to adequately pass this flow rate. As pumps (32) areperistaltic in the present example, their operating flow rate combinedwith the percentage of time they are cycled off due to pressure willprovide the actual flow rate. The flow rate can also be estimated basedupon the decay of the pressure from the time pump (32) cycles off.

At the end of the wash cycle, drain pump (72) is activated to removedetergent solution (86) from basin (14 a) and channels (210, 212, 213,214, 217, 218). Drain pump (72) turns off when drain level sensor (76)indicates that drainage is complete. During the drain process, sterileair is blown through all channels (210, 212, 213, 214, 217, 218) ofendoscope (200) simultaneously to minimize potential carryover.

After the wash cycle is complete, reprocessing system (2) begins a rinsecycle. To initiate this rinse cycle, basin (14 a) is again filled withwarm water (e.g., at approximately 35° C.). Water temperature iscontrolled by controlling the mix of heated and unheated water. Thewater level is detected by pressure sensor (59). The rinse water iscirculated within channels (210, 212, 213, 214, 217, 218) of endoscope(200) via channel pumps (32); and over the exterior of endoscope (200)via circulation pump (70) and sprinkler arm (60) for a certain period oftime (e.g., one minute). As rinse water is pumped through channels (210,212, 213, 214, 217, 218), the flow rate through channels (210, 212, 213,214, 217, 218) is measured and if it falls below the predetermined ratefor any given channel (210, 212, 213, 214, 217, 218), that channel (210,212, 213, 214, 217, 218) is identified as blocked, the program isstopped, and the operator is notified of the condition.

At the end of the rinse cycle, drain pump (72) is activated to removethe rinse water from basin (14 a) and channels (210, 212, 213, 214, 217,218). Drain pump (72) turns off when drain level sensor (76) indicatesthat drainage is complete. During the drain process, sterile air isblown through all channels (210, 212, 213, 214, 217, 218) of endoscope(200) simultaneously to minimize potential carryover. In some versions,the above-described rinsing and draining cycles are repeated at leastonce again, to ensure maximum rinsing of detergent solution (86) fromthe surfaces of endoscope (200) and basin (14 a).

After reprocessing system (2) has completed the desired number ofrinsing and drying cycles, reprocessing system (2) proceeds to adisinfection cycle. To initiate the disinfection cycle, basin (14 a) isfilled with very warm water (e.g., at approximately 53° C.). Watertemperature is controlled by controlling the mix of heated and unheatedwater. The water level is detected by pressure sensor (59). During thefilling process, channel pumps (32) are off in order to ensure that thedisinfectant solution (92) in basin (14 a) is at the in-useconcentration prior to circulating through channels (210, 212, 213, 214,217, 218) of endoscope (200).

Next, a measured volume of disinfection solution (92) is drawn fromdisinfectant metering pre-chamber (96) and delivered into the water inbasin (14 a) via metering pump (100). The volume of disinfectionsolution (92) is controlled by the positioning of fill level switch (98)relative to the bottom of metering pre-chamber (96). Meteringpre-chamber (96) is filled until fill level switch (98) detects liquid.Disinfection solution (92) is drawn from metering pre-chamber (96) untilthe level of disinfection solution (92) in metering pre-chamber (96) isjust below the tip of metering pre-chamber (96). After the necessaryvolume is dispensed, metering pre-chamber (96) is refilled from thebottle of disinfection solution (92). Disinfection solution (92) is notadded until basin (14 a) is filled, so that in case of a water supplyproblem, concentrated disinfectant is not left on endoscope (200) withno water to rinse it. While disinfection solution (92) is being added,channel pumps (32) are off in order to ensure that disinfection solution(92) in basin (14 a) is at the desired in-use concentration prior tocirculating through channels (210, 212, 213, 214, 217, 218) of endoscope(200).

The in-use disinfectant solution (92) is actively pumped throughoutinternal channels (210, 212, 213, 214, 217, 218) by pumps (32) and overthe outer surface of endoscope (200) by circulation pump (70). This maybe done for any suitable duration (e.g., at least 5 minutes). Thetemperature of the disinfection solution (92) may be controlled byin-line heater (80) to stay at a consistent temperature (e.g., about52.5° C.). During the disinfection process, flow through each channel(210, 212, 213, 214, 217, 218) of endoscope (200) is verified by timingthe delivering a measured quantity of solution through channel (210,212, 213, 214, 217, 218). Valve (S1) is closed, and valve (S7) opened,and in turn each channel pump (32) delivers a predetermined volume toits associated channel (210, 212, 213, 214, 217, 218) from metering tube(136). This volume and the time it takes to deliver the volume, providesa very accurate flow rate through the channel (210, 212, 213, 214, 217,218). Anomalies in the flow rate from what is expected for a channel(210, 212, 213, 214, 217, 218) of that diameter and length are flaggedby control system (20) and the process stopped. As in-use disinfectionsolution (92) is pumped through channels (210, 212, 213, 214, 217, 218),the flow rate through channels (210, 212, 213, 214, 217, 218) is alsomeasured as described above.

At the end of the disinfection cycle, drain pump (72) is activated toremove disinfectant solution from basin (14 a) and channels (210, 212,213, 214, 217, 218). During the draining process, sterile air is blownthrough all channels (210, 212, 213, 214, 217, 218) of endoscope (200)simultaneously to minimize potential carryover.

After disinfection solution (92) has been drained from basin (14 a),reprocessing system (2) begins a final rinse cycle. To initiate thiscycle, basin (14 a) is filled with sterile warm water (e.g., atapproximately 45° C.) that has been passed through a filter (e.g., a 0.2μm filter). The rinse water is circulated within channels (210, 212,213, 214, 217, 218) by pumps (32); and over the exterior of endoscope(200) via circulation pump (70) and sprinkler arm 60) for a suitableduration (e.g., 1 minute). As rinse water is pumped through channels(210, 212, 213, 214, 217, 218), the flow rate through channels (210,212, 213, 214, 217, 218) is measured as described above. Drain pump (72)is activated to remove the rinse water from basin (14 a) and channels(210, 212, 213, 214, 217, 218). During the draining process, sterile airis blown through all channels (210, 212, 213, 214, 217, 218) ofendoscope (200) simultaneously to minimize potential carryover. In someversions, the above-described rinsing and draining cycles are repeatedat least two more times, to ensure maximum rinsing of disinfectionsolution (92) residuals from the surfaces of endoscope (200) and basin(14 a).

After the final rinse cycle is complete, reprocessing system (2) beginsa final leak test. In particular, reprocessing system (2) pressurizesthe body of endoscope (200) and measures the leak rate as describedabove. If the final leak test is successful, reprocessing system (2)indicates the successful completion of the cycles via touch-screen (22).From the time of program completion to the time at which lid (16 a) isopened, pressure within the body of endoscope (200) is normalized toatmospheric pressure by opening vent valve (S5) at a predetermined rate(e.g., valve (S5) opened for 10 seconds every minute).

Depending on customer-selected configuration, reprocessing system (2)may prevent lid (16 a) from being opened until a valid useridentification code is entered. Information about the completed program,including the user ID, endoscope ID, specialist ID, and patient ID arestored along with the sensor data obtained throughout the program. If aprinter is connected to reprocessing system (2), and if requested by theoperator, a record of the disinfection program will be printed. Once avalid user identification code has been entered, lid (16 a) may beopened (e.g., using the foot pedal as described above). Endoscope (200)is then disconnected from flush lines (30) and removed from basin (14a). Lid (16 a) can then be closed using both the hardware and softwarebuttons as described above.

III. Exemplary Flush Conduits with Various Discharge Flow Rates

In some instances, it may be desirable to reduce the number of pumps(32) within reprocessing system (2) in order to reduce the overall costand, in some instances, complexity of reprocessing system (2), whilestill maintaining performance for each of the above referenced cycles.For example, reducing the number of pumps (32) may not only reduce thecost of manufacturing reprocessing system (2), but also reduce expectedpump maintenance costs associated with continued use of reprocessingsystem (2). One such exemplary reprocessing system (310) described belowwith respect to FIG. 4 includes one such pump (312) fluidly connected toflush lines (30). One single pump (312) thus simultaneously providesfluid to each flush line (30), rather than separate pumps (32) for eachrespective flush line (30).

In order to achieve the above referenced flow rates through flush lines(30), which may vary in some predetermined differences to accommodatevarious medical devices, reprocessing system (310) further includesadditional valves, such as flush valves (314, 316, 318, 320) that areconfigured to balance fluid flow relative to a predetermined supply flowrate delivered via pump (312). Flush valves (314, 316, 318, 320) thusdistribute flow through each respective flush line (30) to achievesimilar and/or different flow rates according to some desirable,predetermined distribution of fluid flow similar to the plurality ofpumps (32) discussed above. It will be appreciated that any desirablecombination of predetermined flow rates may be used in any such system,such as flush lines (30). Thus, the invention described herein is notintended to be unnecessarily limited to the particular pump (312) andvalve arrangement, such as flush valves (314, 316, 318, 320).Alternative embodiments of reprocessing system (310′, 410, 510, 610)discussed herein also include such valve flow rate control. It will beappreciated that various aspects of valve flow rate control may be usedwith respect to any of reprocessing systems (2, 310, 310′, 410, 510,610) and in any combination as described herein.

FIG. 4 shows a schematic of a second exemplary reprocessing system (310)that may be incorporated into stations (10, 12) (see FIG. 1) with basins(14 a, 14 b). Basin (14 a) shown in FIG. 4 thus receives water fromwater source (50) and discharges all water therefrom via drain (74), asdiscussed above. Exemplary basin (14 a) includes a plurality of flushlines (30) extending therein and a nozzle assembly (322) having aplurality of nozzles (324). Each flush line (30) and nozzle (324) isconfigured to direct the water and/or any additive solution, which maybe generally referred to as the fluid, toward endoscope (200) (see FIG.3) within basin (14 a) for reprocessing. As discussed above, flush lines(30) are configured to discharge the fluid into respective channels(210, 212, 217, 218) (see FIG. 3), at respective predetermined conduitflow rates particularly configured for each respective channel (210,212, 217, 218) (see FIG. 3). To this end, primary pump (312) pumps apredetermined supply flow rate of the fluid collectively to flush lines(30) via a common manifold (326) that is fluidly coupled therebetween.

A plurality of flush valves (314, 316, 318, 320) are positionedrespectively in each flush line (30) and are collectively configured tobalance fluid flow from primary pump (312) such that each flush line(30) discharges fluid therefrom at respective predetermined conduit flowrates. In some versions, flush lines (30) deliver four differentrespective predetermined conduit flow rates of fluid to channels (210,212, 217, 218) (see FIG. 3). In some other versions, one or more of therespective predetermined conduit flow rates are approximately equivalentto accommodate an alternative medical device. In any case, any number offlush lines (30) configured to deliver fluid at any predeterminedconduit flow rates may be used to accommodate one or more types ofmedical devices.

Water source (50) delivers the water to a three-way introduction valve(328), which directs the water through filter (54), check valve (330),and two-way valve (332) into basin (14 a). Similar to reprocessingsystem (2) (see FIG. 2), the water may be collected to a desirableamount as detected by level sensors (59 a, 59 b, 76). The water drainsfrom basin (14 a) and may pass through heater (80) and two-way valve(334) to reach primary pump (312) for distribution toward flush lines(30) and nozzle assembly (322). More particularly a collection oftwo-way valves (336, 338, 340, 342, 344) are fluidly connecteddownstream of primary pump (312) to either allow or inhibit fluid flowtherethrough for various cycles as discussed herein. For example, flushvalve (336) and nozzle valve (338) are configured to control flowrespectively toward flush lines (30) and nozzle assembly (322).

In addition, disinfectant valve (340), drain valve (342), and returnvalve (344) are respectively configured to provide disinfection ofendoscope (200) (see FIG. 1), drainage from reprocessing system (310),and self-disinfection of reprocessing system (310). Specifically,disinfection and self-disinfection will be discussed below in additionaldetail. In the present example, disinfection valve (340), drain valve(342), and return valve (344) are presumed fully closed so as to directthe entirety of the predetermined supply flow of the fluid through theopened flush and nozzle valves (336, 338). However, the collection ofvalves (336, 338, 340, 342, 344) may be fully opened, partially opened,and/or fully closed so as to direct the fluid in any one of a pluralityof desirable ratios to complete the cycles of reprocessing. Theinvention is thus not intended to be limited specifically to thecombination of open and/or closed valves as described herein.

Downstream of flush valve (336), additive storages, such as detergentand alcohol storage (86, 134), and detergent metering pump (88), analcohol metering pump (346), and a gas pump (38) fluidly connect to bereceived with or in place of water flowing toward flush lines (30). Aseries of optional two-way valves (348) may be fluidly connecteddownstream of pumps (88, 346, 38) for additional flow control of variousadditives. In any case, the fluid, such as water, is received withinmanifold (326) at the predetermined supply flow rate. As shown inexemplary reprocessing system (310) of FIG. 4, each of the four flushlines (30) fluidly connects to manifold (326) and extends into basin (14a) for connection with channels (210, 212, 217, 218) (see FIG. 3) ofendoscope (200). More particularly, each flush line (30) includes acoupling port (350) within basin (14 a) that is configured to fluidlyseal against endoscope (200) for fluidly coupling channels (210, 212,217, 218) (see FIG. 3) with respective flush lines (30).

As briefly discussed above, each flush line (30) includes its respectiveflush valve (314, 316, 318, 320) configured to balance fluid flows alongflush lines (30) according to the predetermined conduit flow rates. Insome versions, flush valves (314, 316, 318, 320) are in the form oforifice valves that are sized relative to each to each other to createpredetermined restriction on the fluid entering manifold (326) accordingto the predetermined supply flow rate. As the pressure within themanifold (326) distributes equally through flush lines (30),predetermined conduit flow rates of fluid flow through each respectiveflush valve (314, 316, 318, 320) and discharge from coupling ports(350). Alternatively, flush valves (314, 316, 318, 320) may eachcomprise a variable valve configured to provide a discrete,predetermined flow rate so that the operator may adjust various flowrates to accommodate differing medical devices in reprocessing system(310).

Furthermore, nozzle valve (338) also receives the fluid, such as water,from primary pump (312) and directs the fluid toward nozzle assembly(322). Each nozzle (324) is generally identical in the present exampleand configured to discharge fluid onto the exterior of endoscope (200)(see FIG. 3) within basin (14 a) at approximately equivalentpredetermined nozzle flow rates. To this end, nozzle valve (338) isconfigured to further balance the predetermined supply flow rate offluid with flush valves (314, 316, 318, 320) such that each nozzle (324)and fluid line (30) discharges fluid therefrom according to itspredetermined conduit flow rate and predetermined nozzle flow rate,respectively. Similar to flush valves (314, 316, 318, 320), nozzle valve(338) may also be a variable valve configured to set to a discrete,predetermined flow rate so that the operator may adjust various flowrates to accommodate differing medical devices in reprocessing system(310). Alternatively, nozzle valve (338) in an open position may providenegligible resistance such that the various predetermined flow rates arebalanced simply by restriction in each respective nozzle (324).

In use, reprocessing system (310) receives water from water supply (50)into basin (14 a). Alternatively, basin (14 a) may receive one of theadditives alone or in combination with the water. In any case, the fluidcollected within basin (14 a) is received within primary pump (312) andpumped therefrom at the predetermined supply flow rate. The collectionof valves (338, 340, 342, 344) are generally configured to direct thefluid at the predetermined supply flow rate toward manifold (326) andnozzle assembly (322). The fluid flowing toward manifold (326) may alsoreceive one of the additives, such as detergent, as discussed above inadditional detail.

A predetermined portion of the fluid flows into manifold (326), while aremaining predetermined portion of the fluid flows through nozzle valve(338). Flush valves (336) and nozzle valve (338) generate predeterminedrestriction in each respective flush line (30) in order to direct fluidflow along each flush line (30) with at least two different respectivepredetermined conduit flow rates. Such predetermined restriction andrestriction results in flush valves (336) and nozzle valve (338)apportioning the fluid flow therethrough according to the variouspredetermined flow rates. For example, flush valves (336) and nozzlevalve (338) may be configured to direct fluid along four flush lines(30) with four different respective predetermined conduit flow rates.Once balanced accordingly, the fluid discharges from each coupling port(350) and into respective channels (210, 212, 217, 218) (see FIG. 3)with the predetermined conduit flow rates for reprocessing endoscope(200) (see FIG. 3). It will be appreciated that generating suchpredetermined flow rates via valves (336, 338) may be used in any cycleof reprocessing described herein and is not intended to limit theinvention to any specific reprocessing cycle.

Reprocessing system (310) of the present example includes only oneprimary pump (312) supplying the predetermined supply flow rate of fluidto each flush line (30) and nozzle (324). However, it will beappreciated that any number of pumps may be used in combination, such asin series or parallel, to direct fluid as discussed above. It willtherefore be appreciated that the invention is not intended tounnecessarily be limited to only one primary pump (312).

IV. Exemplary Medical Device Reprocessing Apparatus and ReusableDisinfectant

In some instances, it may be desirable to collect and reuse disinfectantone or more times rather than drain and dispose of the disinfectantafter a single use. For example, reusing disinfectant uses less totaldisinfectant over the useful life of reprocessing system (2) and maythus decrease the overall cost of operation. In addition, concentrateddisinfectant, such as the disinfectant provided from disinfectantstorage (92), may have a damaging effect on or more portions ofreprocessing system (2) until mixed with water as a disinfectantsolution in the desired concentrations. Storing and reusing thedisinfectant solution thus reduces the presence of concentrateddisinfectant and may thus increase the useful life of reprocessingsystem (2).

One such exemplary reprocessing system (310) has a disinfectant storagereservoir (360) from which to pump the disinfectant to basin (14 a) andcollect the disinfectant after completion of the disinfection cycle.Alternative versions of reprocessing system (310′, 410, 510, 610)discussed herein also include exemplary disinfection storage reservoir(360). It will be appreciated that various aspects of reusingdisinfectant may be used with respect to any of reprocessing systems (2,310, 310′, 410, 510, 610) and in any combination as described herein.

Second exemplary reprocessing system (310) includes primary pump (312),which receives the fluid, such as the water and/or disinfectant, andpumps the fluid toward the collection of valves (336, 338, 340, 342,344) as discussed above with respect to various cycles. Moreparticularly, disinfection valve (340) is configured to transitionbetween a circulation state and a collection state during thedisinfection cycle. With disinfection valve (340) in the circulationstate, the collection of valves (336, 338, 340, 342, 344) is configuredto return disinfectant toward flush lines (30) and nozzle assembly (322)for continued circulation during reprocessing. At the conclusion of thedisinfection cycle, disinfection valve (340) transitions from thecirculation state to the collection state and, in conjunction with theremaining collection of valves (336, 338, 342, 344), directs thedisinfectant into disinfectant storage reservoir (360) for reuse infuture disinfection cycles. As used herein, the term “disinfectant”refers to concentrated disinfectant or any solution includingdisinfectant at any concentration. The term “disinfectant” is thus notintended to unnecessarily limit the invention to a particular solutionof disinfectant.

Reprocessing system (310) further includes disinfectant pump (94) influid communication between disinfectant storage reservoir (360) andbasin (14 a). Disinfectant pump (94) thus pumps the disinfectantdirectly into basin (14 a). Check valve (330) is also fluidly connectedbetween basin (14 a) and disinfectant pump (94) and configured toinhibit fluid from within basin (14 a) from flowing backward toward pump(94). In one example, disinfectant storage reservoir (360) is in theform of a break tank such that primary pump (312) and disinfectant pump(94) are configured to individually and/or simultaneously interact withdisinfectant storage reservoir (360). However, it will be appreciatedthat alternative couplings and other features may be used to fluidlycouple any form of disinfectant storage reservoir (360) withinreprocessing system (310) for collecting and reusing disinfectant. Theinvention is thus not intended to be limited to the particulardisinfectant storage reservoir (360).

A third exemplary reprocessing system (310′) has another exemplarydisinfectant storage reservoir (360′) fluidly connected betweendisinfectant valve (340) and pump (94) as shown in FIG. 5. Disinfectantstorage reservoir (360′) is generally similar to disinfectant storagereservoir (360) (see FIG. 4), but also includes additional features forfurther preparing and maintaining the disinfectant for reprocessing.Specifically, disinfectant storage reservoir (360′) includes adisinfectant heater (361′) configured to heat the disinfectant forreprocessing. In one example, disinfectant heater (361′) is configuredto pre-heat the disinfectant in anticipation of use in order to morequickly heat the fluid circulating through reprocessing system (310′)for reasons discussed below in additional detail. Alternatively or inaddition, disinfectant heater (361′) may heat the disinfectant whileflowing from disinfectant storage reservoir (360′) toward pump (94) foruse. In either case, disinfectant heater (361′) may be configured toheat the fluid in conjunction with heater (80) for collectively heatingthe fluid as it flows through reprocessing system (310′).

Disinfectant storage reservoir (360′) further includes a maximum levelsensor (362′), a minimum level sensor (363′), and a temperature sensor(364′) for monitoring the disinfectant flowing through and/or containedwithin disinfectant storage reservoir (360′). Maximum and minimum levelsensors (362′, 363′) are configured to approximate the amount ofdisinfectant contained within disinfectant storage reservoir (360′) andcommunicate with another system, such as control system (20) (see FIG.1). For example, maximum and minimum level sensors (362′, 363′) andcontrol system (20) (see FIG. 1) collectively monitor the amount ofdisinfectant to be above the maximum level, below the minimum level, orbetween the maximum and minimum levels, which is generally desired foroperation. Temperature sensor (364′) also communicates with anothersystem, such as control system (20) (see FIG. 1), to monitor thetemperature of the disinfectant.

In order to further monitor the disinfectant, reprocessing system (310′)also includes a disinfectant concentration measuring subsystem (365′)that is configured to receive the disinfectant from at least onelocation within reprocessing system (310′) for sampling and testing. Tothis end, disinfectant concentration measuring subsystem (365′) of thepresent example receives the disinfectant samples from filter (54) andfrom at least one of flush lines (30). Disinfectant concentrationmeasuring subsystem (365′) is configured to test samples of disinfectantreceived from filter (54) and flush line (30) for a concentration ofdisinfectant present within the fluid flowing therethrough. In the eventthat the measured concentration of disinfectant is not within apredetermined range of concentration or is below a predetermined minimumconcentration, disinfectant concentration measuring subsystem (365′)notifies the operator accordingly. Such measurement and notification maybe further aided by communication with control system (20) (see FIG. 1)discussed above in greater detail. Upon completion of sampling andtesting, the disinfectant drains to drain sump (130) such thatdisinfectant concentration measuring subsystem (365′) is available forfurther use. In parallel, filter (54) also drains directly to drain sump(130) in the event that fluid is not directed toward disinfectantconcentration measuring subsystem (365′). It will be appreciated thatvarious devices and method for measuring disinfectant concentration andnotifying the operator may be used as described herein and, as such, theinvention is not intended to be unnecessarily limited to any particulardisinfectant concentration measuring subsystem. By way of furtherexample only, disinfectant concentration measuring subsystem (365′) maybe configured and operable in accordance with at least some of theteachings of U.S. patent application Ser. No. [ATTORNEY DOCKET NO.ASP5112USNP.0635890], entitled “Apparatus and Method to MeasureConcentration of Disinfectant in Medical Device Reprocessing System,”filed on even date herewith, the disclosure of which is incorporated byreference herein.

Additional monitoring is provided in reprocessing system (310′) by abasin temperature sensor (366′), a drain sump overflow sensor (367′),and a plurality of flow sensors (368′). Basin temperature sensor (366′)is generally configured to measure the temperature of fluid therein,while drain sump overflow sensor (367′) is configured to measure anexcess of fluid collected within drain sump (130) for alerting theoperator. Each flow sensor (368′) is configured to measure thevolumetric flow rate of fluid flowing therethrough for monitoring theoverall circulation of fluid through reprocessing system (310′). Each oftemperature sensor (366′), drain sump overflow sensor (367′), and flowsensors (368′) may communicate with control system (20) (see FIG. 1) forcollective operation with any one or more of the sensors discussedherein for using reprocessing system (310). However, it will beappreciated that alternative devices and methods of monitoringreprocessing system (310′) may be used and that the invention describedherein is not intended to be unnecessarily limited to reprocessingsystem (310′).

By way of further example, a fourth exemplary reprocessing system (410)is shown in FIG. 6. Reprocessing system (410) of this example generallyincludes disinfectant reservoir (360), disinfectant pump (94), and checkvalve (330) fluidly connected between basin (14 a) and disinfectantvalve (340). In addition, a three-way neutralization valve (412) isfluidly connected between check valve (330) and disinfectant pump (98)and is in fluid communication with a neutralization tank (414).Neutralization tank (414) is configured to receive the disinfectant andneutralize some or all of its sterilizing properties for disposal asdictated by various rules and regulations. Neutralization tank (414) isalso removable from reprocessing system (410) to ease operator access toneutralized disinfectant for proper disposal.

To initiate the disinfection cycle of reprocessing system (310) shown inFIG. 4, disinfectant pump (94) pumps the disinfectant from disinfectantstorage reservoir (360) toward basin (14 a). The disinfectant containedin disinfectant storage reservoir (360) may be premixed to a desirableconcentration or mixed with water in basin (14 a) as discussed abovewith respect to reprocessing system (2) (see FIG. 2). From basin (14 a),the disinfectant is circulated through flush lines (30) and nozzleassembly (322) for disinfecting endoscope (200) (see FIG. 3) via primarypump (312). In addition, heater (80) heats the disinfectant fordisinfection.

Rather than necessarily disposing of the disinfectant after disinfectingendoscope (200) (see FIG. 3), disinfection valve (340) opens such thatprimary pump (312) directs the disinfectant into disinfectant storagereservoir (360). Disinfection valve (340) then closes to inhibit otherfluids from entering the disinfectant storage reservoir (360) so thatother cycles for reprocessing may be completed. The disinfectant iscontained in disinfectant storage reservoir (360) and available forreuse in future disinfection cycles. In the event that the disinfectantneeds to be replaced, such as due to contamination, dilution ofdisinfectant below a predetermined concentration, or following apredetermined number of use, the operator manipulates a drain hose (notshown) in fluid communication with drain (74) and directs the drain hoseinto another container, such as neutralization tank (414) (see FIG. 6),for collection and proper disposal.

In contrast, reprocessing system (410) shown in FIG. 6 generallyoperates disinfection cycle as discussed above, but, instead, thedisinfectant is pumped into neutralization tank (414). Moreparticularly, neutralization valve (412) is configured to transitionbetween a basin state and a neutralization state. In the basin state,neutralization valve (412) directs the disinfectant to basin (14 a). Inthe neutralization state, neutralization valve (412) directs thedisinfectant to neutralization tank (414). Disinfectant pump (94) thuspumps the disinfectant from disinfectant storage reservoir (360) andinto neutralization tank (414) for neutralization, removal, and properdisposal.

V. Exemplary Medical Device Reprocessing Apparatus withSelf-Disinfection Cycle

In some instances, it may be desirable to sterilize reprocessing system(2) with disinfectant and/or heated water for chemical and/or andthermal disinfection to perform a “self-disinfection cycle.”. However,in order to fully disinfect reprocessing system (2), fluid (i.e.,disinfectant and/or heated water) is preferably flushed through theentire reprocessing system (2) that may have come into contact withendoscope (200) and/or waste material. Even in the event that chemicaland/or thermal disinfection provides such thorough contact, reprocessingsystem (2) may require a relatively significant amount of fluid forself-disinfection, resulting in increased cost of operation.Furthermore, operation of the self-disinfection cycle may include manualmanipulation of various valves and conduits to both provide thedisinfectant and sufficiently heat the disinfectant for effectivechemical and thermal sterilization. Such costs and operatorinconvenience may decrease the likelihood of the operator performing theself-disinfection cycle, thus increasing the likelihood thatreprocessing system (2) may not be fully sterilized in advance ofreprocessing an endoscope (200). It may thus be desirable to providereprocessing system (2) with one or more features configured to performconvenient chemical and/or thermal disinfection while also reducing theamount of fluid, such as disinfectant and/or heated water, disposed offollowing completion of the self-disinfection cycle.

As shown in FIGS. 4-6, exemplary reprocessing systems (310, 310′, 410)include a return flow path (370) that is configured to guide the fluid,such as disinfectant and/or heated water, from primary pump (312) tointroduction valve (328). Reprocessing systems (310, 310′, 410) are thusconfigured to direct the fluid throughout portions thereof that may havecontacted endoscope (200) and/or waste material removed from endoscope(200). Reprocessing systems (310, 310′, 410) also include at least oneof disinfection storage reservoirs (360, 360′) to collect and reuse thedisinfectant for reduced cost and added convenience to the operator.

Further operator convenience is shown and described with respect to afifth exemplary reprocessing system (510), shown in FIG. 7, whichincludes a heater (512) and upstream temperature sensor (514) positionedin return flow path (370). By positioning heater (512) and sensor (514)in return flow path (370), temperature sensor (514) accurately senses aminimum fluid temperature in reprocessing system (510) while effectivelyand conveniently heating the fluid without the necessity for manualmanipulation of various valves and conduits by the operator. Alternativeversions, such as a sixth exemplary reprocessing system (610) discussedherein with reference to FIG. 8, may also include exemplary return flowpath (370), heater (512), and temperature sensor (514). It will beappreciated that various aspects of self-sterilization may be used withrespect to any of reprocessing systems (2, 310, 310′, 410, 510, 610) andin any combination as described herein.

A. Exemplary Medical Device Reprocessing Apparatus with a Return FlowPath for Self-Disinfection

With respect to reprocessing systems (310, 310′, 410) shown respectivelyin FIGS. 4-6, return flow path (370) fluidly connects primary pump (312)to introduction valve (328) as described briefly above for fullycirculating fluid, such as disinfectant, throughout reprocessing system(310, 310′, 410). Each return flow path (370), which may be moreparticularly referred to as a self-disinfection flow path in at leastsome instances, also includes check valve (330) to inhibit fluid, suchas water, from flowing backward along return flow path (370) towardprimary pump (312). Reprocessing system (310) further includes returnvalve (344) to further control fluid flowing therealong. By way ofexample, return valve (344) is configured to transition between an openstate and a closed state to respectively allow and inhibit the flow offluid. Alternatively, return valve (344) may transition to one or morediscrete states between the open and closed states for balancingreprocessing system (310) in some desirable, predetermined operation.While return valve (344) may have a variable state, it will beappreciated that such a state, in conjunction with remaining valves(336, 338, 340, 342) may affect operation of reprocessing system (310).The invention described herein is thus not intended to be unnecessarilylimited to exemplary return valve (344). For example, alternativereprocessing systems (310′, 410) do not include return valve (344)upstream of check valve (330) and, in turn, at least some fluidcontinuously circulates through reprocessing systems (310′, 410).

Introduction valve (328) in each of reprocessing systems (310, 310′,410) shown in FIGS. 4-6 is configured to transition between a supplystate and a recirculation state. In the supply state, introduction valve(328) directs all water from water supply (50) toward basin (14 a),while inhibiting any fluid from being introduced into the water viareturn flow path (370). In contrast, introduction valve (328) in therecirculation state inhibits water from water supply (50) from enteringreprocessing systems (310, 310′, 410), but allows fluid flowing thereinvia return flow path (370) to be redirected back toward basin (14 a) forcontinued use. While return flow path (370) may generally be used in anycycle for reprocessing endoscope (200) (see FIG. 3), disinfectantstorage reservoir (360) in combination with return flow path (370)provides for effective self-disinfection.

B. Exemplary Medical Device Reprocessing Apparatus for Improved ThermalSelf-Disinfection

FIG. 7 shows exemplary reprocessing system (510) with heater (512) asdiscussed briefly above. To this end, fluid (e.g., water) is directedvia introduction valve (328) toward a water supply nozzle (516) andnozzle assembly (322) for introduction into basin (14 a). From basin (14a), the fluid drains through valve (334) and is pumped via primary pump(312) toward flush lines (30) and return flow path (370). Heater (512)is positioned directly upstream from introduction valve (328) forheating fluid (e.g., water) immediately before being recirculatedthrough reprocessing system (510). In addition, temperature sensor (514)measures the temperature of the fluid (e.g., water) immediately upstreamof heater (512) prior to being heated to collect a minimum fluidtemperature within reprocessing system (510). Heater (512) is configuredto heat the fluid (e.g., water) flowing therethrough until the minimumfluid temperature reaches a predetermined temperature, such as apredetermined disinfection temperature that is configured to thermallydisinfect reprocessing system (510). In the present example, water isdirected along return flow path (370), heated to the predetermineddisinfection temperature for self-disinfection, and circulated backthrough reprocessing system (510) for thermal self-disinfection.However, it should be understood that in some alternative versionsheater (512) may be used to heat disinfectant during a self-disinfectioncycle.

While reprocessing system (510) shares various similarities withreprocessing systems (2, 310, 310′, 410) (see FIGS. 1-6), such asprimary pump (312), flush valves (314, 316, 318, 320), and disinfectantstorage reservoir (360), reprocessing system (510) of this example alsoincludes at least several distinct features for directing fluidtherealong. More particularly, reprocessing system (510) includes anupstream 3-way valve (518) and a downstream 3-way valve (520) that areconfigured to direct flow to generate the various cycles discussedherein.

Primary pump (312) pumps fluid from basin (14 a) directly into upstreamvalve (518), which directs the fluid toward either disinfectant storagereservoir (360) for collection and reuse or to downstream valve (520).Downstream valve (520) is configured to direct the fluid toward eitherdrain (74) or toward a fluid junction (522), which divides thepredetermined supply flow rate of fluid simultaneously along return flowpath (370) and into another predetermined supply flow rate directedtoward flush lines (30) and nozzle assembly (322).

As shown in FIG. 7, disinfectant storage reservoir (360) is configuredto collect disinfectant for use as described above in the disinfectioncycle. Disinfectant pump (94) pumps the disinfectant toward manifold(326) to be introduced into the remainder of reprocessing system (510).In fact, the disinfectant flows throughout reprocessing system (510) asdivided by fluid junction (522). Of course, reprocessing system (510) isconfigured to collect the disinfectant at the conclusion of thedisinfection and self-disinfection cycles by directing the disinfectantaccordingly via upstream valve (518).

Furthermore, with respect to downstream valve (520) and fluid junction(522), primary pump (312) directs the fluid along return flow path (370)toward temperature sensor (514), heater (512), and introduction valve(328) for heating the fluid to the desired temperature. Fluid junction(522) effectively directs the fluid with the predetermined supply flowrate of fluid simultaneously along two general flow paths. The firstflow path of fluid reprocesses endoscope (200) in basin (14 a), whereasthe second flow path of fluid is heated and then mixed back into thefluid flowing through the remainder of reprocessing system (510). Inthis way, return flow path (370) is always in use with flush lines (30)regardless of whether or not the fluid is being heated for disinfectionor self-disinfection. Of course, it will be appreciated that alternativeflow paths may be used for directing fluid through an alternativelyarranged reprocessing system (510). The invention is thus not intendedto be unnecessarily limited to the flow arrangements as describedherein.

With respect to FIG. 8, exemplary reprocessing system (610) is similarto reprocessing system (510), but also includes neutralization valve(412) and neutralization tank (414). Specifically, neutralization valve(412) is fluidly connected between a disinfectant spigot (612) anddisinfectant pump (94). Disinfectant pump (412) is thereby configured todirect disinfectant from disinfectant storage reservoir (360), throughneutralization valve (412), and into neutralization tank (414) forneutralization, removal, and proper disposal.

C. Exemplary Method of Self-Disinfecting a Reprocessing System

In use, reprocessing systems (310, 310′, 410) self-disinfect by pumpingfiltered water in two distinct stages. In a first stage, water isdirected from water source (50) and into basin (14 a). From basin (14a), the water circulates through heater (80) and is pumped by primarypump (312) only along the self-disinfection path (370), to be returnedback to basin (14 a) in the present example. The water circulationcontinues as the water is heated to a predetermined disinfectiontemperature, thereby disinfecting the water inlet path and reducing thebioburden at filter (54). Once the water reaches the predetermineddisinfection temperature, the water continues to circulate for apredetermined amount of time for effective thermal self-disinfection.

Stage two of self-disinfection begins by redirecting the circulatingwater from the self-disinfection path (370) and toward manifold (326)and the plurality of nozzles (324) for discharge into basin (14 a). Thewater continues to circulate in stage two while continuing to be heatedto maintain the predetermined disinfection temperature, therebythermally disinfecting various components that connect with endoscope(200) (see FIG. 3). After all, in the present example, endoscope (200)is not present in basin (14 a) during self-disinfection. The watercontinues to circulate for another predetermined amount of time in stagetwo until thermal self-disinfection is complete.

Additional disinfection that may include endoscope (200) (see FIG. 3) isperformed by pumping disinfectant from disinfectant storage reservoir(360) and into basin (14 a). Primary pump (312) in turn pumps thedisinfectant toward the collection of valves (336, 338, 340, 342, 344)such that disinfectant flows through flush lines (30) and nozzleassembly (322) and along return flow path (370). The disinfectant inreturn flow path (370) is received within introduction valve (328) andcirculated back toward basin (14 a) with the disinfectant from flushlines (30) and nozzle assembly (322). The disinfectant may then berecirculated for further disinfection or returned to disinfectantstorage reservoir (360) upon the completion of chemical disinfection.Heater (80) may also be used to heat the disinfectant for furtherthermal disinfection during circulation of the disinfectant duringself-disinfection.

Reprocessing systems (510, 610) shown in FIGS. 7-8 disinfect by pumpingdisinfectant from disinfectant storage reservoir (360) and toward flushlines (30) for introduction into basin (14 a). Primary pump (312)receives the disinfectant from basin (14 a) and pumps the disinfectantthrough upstream and downstream valves (518, 520) and into fluidjunction (522). Fluid junction (522) divides the flow of disinfectanttherethrough, with one portion of the flow being directed toward flushlines (30) and nozzle assembly (322), while another portion of the flowis directed along return flow path (370). The disinfectant flows throughintroduction valve (328) and into basin (14 a) with the remainingportion of disinfectant flowing to chemically disinfect the entirereprocessing system (510, 610) that may have contacted endoscope (200)(see FIG. 3) and or waste material removed therefrom.

Thermal disinfection initiates as the fluid flows along return flow path(370) through heater (512), which begins heating the fluid flowingduring disinfection. The heated fluid mixes with the cooler fluid in thebasin (14 a) and through reprocessing system (510, 610) until all of thefluid reaches the predetermined disinfection temperature. Temperaturesensor (514), positioned upstream of heater (512), effectively sensesthe local fluid temperature at its relatively coolest location. Thus,when the measured temperature reaches the predetermined disinfectiontemperature, the temperature of the remaining fluid is presumed to alsobe at least at the predetermined disinfection temperature.

While the above description applies to self-disinfection and furtherdisinfection of reprocessing systems (310, 310′, 410, 510, 610), it willbe appreciated that any fluid may be so circulated for heating and/orreintroduction via introduction valve (328). The return flow path (370)and other various components are thus not intended to be unnecessarilylimited to use with water and/or disinfectant in the above describedsystems.

VI. Exemplary Combinations

The following examples relate to various non-exhaustive ways in whichthe teachings herein may be combined or applied. It should be understoodthat the following examples are not intended to restrict the coverage ofany claims that may be presented at any time in this application or insubsequent filings of this application. No disclaimer is intended. Thefollowing examples are being provided for nothing more than merelyillustrative purposes. It is contemplated that the various teachingsherein may be arranged and applied in numerous other ways. It is alsocontemplated that some variations may omit certain features referred toin the below examples. Therefore, none of the aspects or featuresreferred to below should be deemed critical unless otherwise explicitlyindicated as such at a later date by the inventors or by a successor ininterest to the inventors. If any claims are presented in thisapplication or in subsequent filings related to this application thatinclude additional features beyond those referred to below, thoseadditional features shall not be presumed to have been added for anyreason relating to patentability.

Example 1

An apparatus for reprocessing a medical device having a first devicechannel and a second device, the apparatus comprising: (a) adecontamination basin configured to receive the medical device therein;(b) a first flush conduit and a second flush conduit, wherein the firstflush conduit has a first coupling port configured to fluidly connect tothe first device channel, wherein the second flush conduit has a secondcoupling port configured to fluidly connect to the second devicechannel, wherein the first and second flush conduits extend into thedecontamination basin such that the first and second coupling ports areconfigured to be positioned within the decontamination basin; (c) amanifold fluidly connected to the first and second flush conduits,wherein the manifold is configured to distribute the fluid receivedtherein to each of the first and second flush conduits; (d) a primarypump fluidly connected to the manifold and configured to discharge afluid into the manifold at a predetermined supply flow rate; and (e) afirst valve positioned in the first flush conduit in fluid communicationwith the first flush coupling and a second valve in the second flushconduit in fluid communication with the second flush coupling, whereinthe first and second valves are configured to balance the fluidintroduced into the manifold at the predetermined supply flow rate suchthat the fluid discharges from the first and second coupling ports at afirst predetermined conduit flow rate and a second predetermined conduitflow rate, respectively, for flushing the first and second devicechannels during reprocessing of the medical device.

Example 2

The apparatus of Example 1, wherein the medical device has a seconddevice channel and a fourth device channel, the apparatus furthercomprising: (a) a third flush conduit and a fourth flush conduit,wherein the third flush conduit has a third coupling port configured tofluidly connect to the third device channel, wherein the fourth flushconduit has a fourth coupling port configured to fluidly connect to thefourth device channel, wherein the third and fourth flush conduitsextend into the decontamination basin such that the third and fourthcoupling ports are configured to be positioned within thedecontamination basin; (b) the manifold fluidly connected to the thirdand fourth flush conduits and configured to distribute the fluidreceived therein to each of the third and fourth flush conduits; and (c)a third valve positioned in the third flush conduit in fluidcommunication with the third flush coupling and a fourth valve in thefourth flush conduit in fluid communication with the fourth flushcoupling, wherein the third and fourth valves are configured to balancethe fluid introduced into the manifold at the predetermined supply flowrate such that the fluid discharges from the third and fourth couplingports at a third predetermined conduit flow rate and a fourthpredetermined conduit flow rate, respectively, for flushing the thirdand fourth device channels during reprocessing of the medical device.

Example 3

The apparatus of any one or more of Examples 1 through 2, wherein thefirst predetermined conduit flow rate and second predetermined conduitflow rate are approximately equivalent.

Example 4

The apparatus of any one or more of Examples 1 through 3, furthercomprising: (a) a nozzle assembly positioned within the decontaminationbasin and in fluid communication with the primary pump to receive thefluid therefrom, wherein the nozzle assembly is configured to dischargethe fluid onto the medical device within the decontamination basin; and(b) a nozzle valve fluidly connected between the nozzle assembly and theprimary pump, wherein the nozzle valve is configured to balance thefluid being directed from the primary pump at the predetermined supplyflow rate such that the fluid discharges from the nozzle assembly at apredetermined nozzle flow rate during reprocessing of the medicaldevice.

Example 5

The apparatus of Example 4, wherein the nozzle assembly includes aplurality of nozzles, and wherein each of the plurality of nozzles isconfigured to discharge the fluid onto the medical device within thedecontamination basin.

Example 6

The apparatus of any one or more of Examples 1 through 5, furthercomprising: (a) an additive storage configured to contain an additivefor use with the fluid; and (b) an additive pump configured to pump theadditive toward the first and second flush conduits, wherein theadditive pump is fluidly connected between the manifold and the primarypump such that the additive pump is configured to introduce the additiveinto the fluid between the manifold and the primary pump for directingthe fluid and the additive collectively toward the first and secondflush conduits.

Example 7

The apparatus of any one or more of Examples 1 through 6, furthercomprising: (a) a disinfectant storage reservoir fluidly connected tothe decontamination basin and configured to contain a disinfectant; (b)a disinfectant pump in fluid communication between the disinfectantstorage reservoir and the decontamination basin, wherein thedisinfectant pump is configured to pump the disinfectant from thedisinfectant storage reservoir toward the decontamination basin, whereinthe primary pump is configured to receive the disinfectant from thedecontamination basin and direct the disinfectant along at least one ofa circulation phase and a collection phase; and (c) a disinfection valvein fluid communication with each of the decontamination basin, thedisinfectant storage reservoir, and the primary pump, wherein thedisinfection valve is configured to transition between a circulationstate and a collection state, wherein the disinfection valve in thecirculation state is configured to direct the disinfectant from theprimary pump and toward the decontamination basin in the circulationphase, and wherein the disinfection valve in the collection state isconfigured to direct the disinfectant from the primary pump and towardthe disinfectant storage reservoir, wherein the disinfectant storagereservoir is configured to collect the disinfectant from the primarypump in the collection phase for reuse while reprocessing the medicaldevice.

Example 8

The apparatus of Example 7, further comprising: (a) a neutralizationvalve in fluid communication with the decontamination basin and thedisinfectant pump, wherein the neutralization valve is configured totransition between a basin state and a neutralization state; and (b) aneutralization tank fluidly connected to the neutralization valve andconfigured to neutralize the disinfectant received therein, wherein theneutralization valve in the basin state is configured to direct thedisinfectant from the disinfectant pump toward the decontaminationbasin, and wherein the neutralization valve in the neutralization stateis configured to direct the disinfectant from the disinfectant pumptoward the neutralization tank for collection therein.

Example 9

The apparatus of Example 8, wherein the neutralization valve is fluidlyconnected between the decontamination basin and the disinfectant pump.

Example 10

The apparatus of any one or more of Examples 7 through 9, furthercomprising: (a) a recirculation conduit in fluid communication with thedecontamination basin and configured to receive the fluid directedtherefrom; and (b) an introduction valve fluidly connected to therecirculation conduit and configured to fluidly connect to a fluidsupply, wherein the introduction valve is in fluid communication withthe decontamination basin and configured to transition between a supplystate and a recirculation state, wherein the introduction valve in thesupply state is configured to receive the fluid from the fluid supplyand direct the fluid toward the decontamination basin, and wherein theintroduction valve in the recirculation state is configured to receivethe fluid from the recirculation conduit and direct the fluid toward thedecontamination basin.

Example 11

The apparatus of Example 10, further comprising: (a) a temperaturesensor positioned within the recirculation conduit and configured tomeasure a temperature of the disinfectant flowing therethrough; and (b)a heater configured to heat the disinfectant flowing therethrough to adesirable temperature for circulating heated disinfectant toward thedecontamination basin with the introduction valve in the recirculationstate.

Example 12

The apparatus of any one or more of Examples 10 through 11, furthercomprising a return valve positioned in the recirculation conduit andconfigured to transition between an open state and a closed state,wherein the return valve in the open state is configured to receive thedisinfectant along the recirculation conduit, and wherein the returnvalve in the closed state is configured to inhibit the disinfectant fromflowing along the recirculation conduit and urge the disinfectant towardthe manifold.

Example 13

The apparatus of any one or more of Examples 10 through 12, wherein theprimary pump, the manifold, and the recirculation conduit are in fluidcommunication such that the pump is configured to simultaneously directdisinfectant along the recirculation conduit and the manifold.

Example 14

The apparatus of any one or more of Examples 1 through 13, furthercomprising a self-disinfection pathway, wherein the self-disinfectionpathway is configured to communicate fluid through the apparatus tothereby self-disinfect the apparatus.

Example 15

The apparatus of any one or more of Examples 1 through 14, furthercomprising a heater fluidly connected between the decontamination basinand the primary pump, wherein the heater is configured to heat the fluidflowing therethrough to a predetermined temperature for circulatingheated fluid toward the manifold.

Example 16

An apparatus for reprocessing a medical device with a disinfectant,comprising: (a) a decontamination basin configured to receive themedical device therein; (b) a disinfectant storage reservoir fluidlyconnected to the decontamination basin and configured to contain thedisinfectant; (c) a disinfectant pump in fluid communication between thedisinfectant storage reservoir and the decontamination basin, whereinthe disinfectant pump is configured to pump the disinfectant from thedisinfectant storage reservoir toward the decontamination basin; (d) afirst pump fluidly connected to the decontamination basin and configuredto receive the disinfectant therefrom and direct the disinfectant alongat least one of a circulation phase or a collection phase; and (e) adisinfection valve in fluid communication with each of thedecontamination basin, the disinfectant storage reservoir, and the firstpump, wherein the disinfection valve is configured to transition betweena circulation state and a collection state, wherein the disinfectionvalve in the circulation state is configured to direct the disinfectantfrom the first pump and toward the decontamination basin in thecirculation phase, and wherein the disinfection valve in the collectionstate is configured to direct the disinfectant from the first pump andtoward the disinfectant storage reservoir, wherein the disinfectantstorage reservoir is configured to collect the disinfectant from thefirst pump in the collection phase for reuse while reprocessing themedical device.

Example 17

The apparatus of Example 16, further comprising: (a) a neutralizationvalve in fluid communication with the decontamination basin and thedisinfectant pump, wherein the neutralization valve is configured totransition between a basin state and a neutralization state; and (b) aneutralization tank fluidly connected to the neutralization valve andconfigured to neutralize the disinfectant received therein, wherein theneutralization valve in the basin state is configured to direct thedisinfectant from the disinfectant pump toward the decontaminationbasin, and wherein the neutralization valve in the neutralization stateis configured to direct the disinfectant from the disinfectant pumptoward the neutralization tank for collection therein.

Example 18

The apparatus of any one or more of Examples 16 through 17, furthercomprising: (a) a recirculation conduit in fluid communication with thedecontamination basin and configured to receive the fluid directedtherefrom; and (b) an introduction valve fluidly connected to therecirculation conduit and configured to fluidly connect to a fluidsupply, wherein the introduction valve is in fluid communication withthe decontamination basin and is configured to transition between asupply state and a recirculation state, wherein the introduction valvein the supply state is configured to receive the fluid from the fluidsupply and direct the fluid toward the decontamination basin, andwherein the introduction valve in the recirculation state is configuredto receive the fluid from the recirculation conduit and direct the fluidtoward the decontamination basin

Example 19

The apparatus of Example 18, further comprising: (a) a temperaturesensor positioned within the recirculation conduit and configured tomeasure a temperature of the disinfectant flowing therethrough; and (b)a heater configured to heat the disinfectant flowing therethrough to adesirable temperature for circulating heated disinfectant toward thedecontamination basin with the introduction valve in the recirculationstate

Example 20

A method of reprocessing a medical device having a first channel and asecond channel extending therethrough, comprising: (a) pumping a primaryfluid flow with a predetermined supply flow rate from a pump into amanifold having a first flush conduit and a second flush conduit influid communication therewith; (b) directing a first fluid flow from theprimary fluid flow and into a first valve along the first flush conduit;(c) directing a second fluid flow from the primary fluid flow and into asecond valve along the second flush conduit; (d) balancing the first andsecond fluid flows with the first and second valves such that the firstfluid flow has a first predetermined conduit flow rate and the secondfluid flow has a second predetermined conduit flow rate; and (e)discharging the first and second fluid flows with the first and secondpredetermined conduit flow rates into the respective first and secondchannels of the medical device for reprocessing the medical device.

VII. Miscellaneous

It should be understood that any of the teachings herein may be readilycombined with the teachings of U.S. patent application Ser. No.[ATTORNEY DOCKET NO. ASP5111USNP.0635888], entitled “Apparatus andMethod to Identify Endoscope Type and Provide Tailored Reprocessing,”filed on even date herewith, the disclosure of which is incorporated byreference herein. In particular, the systems described herein may bereadily modified to incorporate the features taught in U.S. patentapplication Ser. No. [ATTORNEY DOCKET NO. ASP5111USNP.0635888]. Varioussuitable ways in which the teachings herein may be combined with theteachings of U.S. patent application Ser. No. [ATTORNEY DOCKET NO.ASP5111USNP.0635888] will be apparent to those of ordinary skill in theart.

Similarly, it should be understood that any of the teachings herein maybe readily combined with the teachings of U.S. patent application Ser.No. [ATTORNEY DOCKET NO. ASP5112USNP.0635890], entitled “Apparatus andMethod to Measure Concentration of Disinfectant in Medical DeviceReprocessing System,” filed on even date herewith, the disclosure ofwhich is incorporated by reference herein. In particular, the systemsdescribed herein may be readily modified to incorporate the featurestaught in U.S. patent application Ser. No. [ATTORNEY DOCKET NO.ASP5112USNP.0635890]. Various suitable ways in which the teachingsherein may be combined with the teachings of U.S. patent applicationSer. No. [ATTORNEY DOCKET NO. ASP5112USNP.0635890] will be apparent tothose of ordinary skill in the art.

It should be appreciated that any patent, publication, or otherdisclosure material, in whole or in part, that is said to beincorporated by reference herein is incorporated herein only to theextent that the incorporated material does not conflict with existingdefinitions, statements, or other disclosure material set forth in thisdisclosure. As such, and to the extent necessary, the disclosure asexplicitly set forth herein supersedes any conflicting materialincorporated herein by reference. Any material, or portion thereof, thatis said to be incorporated by reference herein, but which conflicts withexisting definitions, statements, or other disclosure material set forthherein will only be incorporated to the extent that no conflict arisesbetween that incorporated material and the existing disclosure material.

Having shown and described various embodiments of the present invention,further adaptations of the methods and systems described herein may beaccomplished by appropriate modifications by one of ordinary skill inthe art without departing from the scope of the present invention.Several of such potential modifications have been mentioned, and otherswill be apparent to those skilled in the art. For instance, theexamples, embodiments, geometrics, materials, dimensions, ratios, steps,and the like discussed above are illustrative and are not required.Accordingly, the scope of the present invention should be considered interms of the following claims and is understood not to be limited to thedetails of structure and operation shown and described in thespecification and drawings.

1.-20. (canceled)
 21. A method of reprocessing a medical device with a disinfectant, the method comprising: (a) pumping the disinfectant from a disinfectant storage reservoir toward a decontamination basin with a disinfectant pump, wherein the decontamination basin is configured to contain the medical device; (b) directing the disinfectant along at least one of a circulation phase or a collection phase with a primary pump fluidly connected to the decontamination basin and configured to receive the disinfectant therefrom; (c) directing the disinfectant from the primary pump and toward the decontamination basin in the circulation phase; and (d) transitioning from the circulation phase to the collection phase to direct the disinfectant from the primary pump and toward the disinfectant storage reservoir.
 22. The method of claim 21, further comprising: (a) directing the disinfectant from the disinfectant pump toward a neutralization tank fluidly connected between the decontamination basin and the disinfectant pump; and (b) neutralizing the disinfectant in the neutralization tank.
 23. The method of claim 21, further comprising: (a) receiving a fluid from a fluid supply within an introduction valve in a supply state thereby directing the fluid from the introduction valve toward the decontamination basin along an introduction conduit; and (b) inhibiting the fluid from the fluid supply from flowing along a recirculation conduit via the introduction valve in the supply state.
 24. The method of claim 23, further comprising: (a) transitioning the introduction valve from the supply state to a recirculation state to thereby fluidly connect the introduction conduit to the recirculation conduit and inhibit the fluid from the fluid supply from flowing into the introduction conduit; and (b) directing the disinfectant from the primary pump along the recirculation conduit toward the introduction conduit and the decontamination basin.
 25. The method of claim 21, further comprising disinfecting the medical device using the disinfectant disposed within the decontamination basin.
 26. The method of claim 21, further comprising diluting the disinfectant from a first concentration to a second concentration after pumping the disinfectant from the disinfectant storage reservoir and prior to directing the disinfectant from the primary pump and toward the decontamination basin.
 27. The method of claim 26, wherein diluting the disinfectant further comprises mixing the first concentration of the disinfectant mixed with water to produce the second concentration of the disinfectant.
 28. The method of claim 21, wherein pumping the disinfectant further comprises pumping the disinfectant directly into the decontamination basin from the disinfectant storage reservoir.
 29. The method of claim 21, further comprising measuring a temperature of fluid in the decontamination basin using a temperature sensor.
 30. The method of claim 21, further comprising heating the disinfectant using a disinfectant heater prior to pumping the disinfectant.
 31. The method of claim 21, further comprising heating the disinfectant using a disinfectant heater while the disinfectant flows from disinfectant storage reservoir toward the disinfectant pump.
 32. The method of claim 21, further comprising communicating with a control system using a fluid level sensor, at least one of a minimum fluid level of the disinfectant disposed in the disinfectant storage reservoir or a maximum fluid level of the disinfectant disposed in the disinfectant storage reservoir.
 33. The method of claim 21, wherein pumping the disinfectant further comprising pumping the disinfectant from the disinfectant storage reservoir toward the decontamination basin with the disinfectant pump fluidly connected between the disinfectant storage reservoir and the decontamination basin.
 34. The method of claim 21, further comprising measuring an excess of fluid collected within a drain sump using a drain sump overflow sensor.
 35. The method of claim 21, further comprising fluidly connecting the primary pump with an introduction valve using a self-disinfection pathway such that the introduction valve receives fluid from the self-disinfection pathway to self-disinfect an inlet path fluidly connecting the introduction valve to the decontamination basin, wherein the self-disinfection pathway is fluidly connected downstream of the primary pump, wherein the self-disinfection pathway and a manifold are respectively in parallel fluid communication with the decontamination basin.
 36. A method of reprocessing a medical device with a disinfectant, the method comprising: (a) directing the disinfectant along at least one of a circulation phase or a collection phase with a primary pump fluidly connected to a decontamination basin and configured to receive the disinfectant therefrom, wherein the decontamination basin is configured to contain the medical device; (b) directing the disinfectant from the primary pump and toward the decontamination basin in the circulation phase; (c) directing the disinfectant from a disinfectant pump toward a neutralization tank fluidly connected between the decontamination basin and the disinfectant pump; and (d) neutralizing the disinfectant in the neutralization tank.
 37. The method of claim 36, wherein directing the disinfectant from the disinfectant pump toward the neutralization tank further comprises actuating a neutralization valve to direct the disinfectant from the disinfectant pump toward the neutralization tank.
 38. An apparatus for reprocessing a medical device with a disinfectant, comprising: (a) a decontamination basin configured to receive the medical device therein; (b) a disinfectant storage reservoir fluidly connected to the decontamination basin and configured to contain the disinfectant; (c) a disinfectant pump in fluid communication between the disinfectant storage reservoir and the decontamination basin, wherein the disinfectant pump is configured to pump the disinfectant from the disinfectant storage reservoir toward the decontamination basin; (d) a primary pump fluidly connected to the decontamination basin and configured to receive the disinfectant therefrom and direct the disinfectant along at least one of a circulation phase or a collection phase; and (e) a disinfection valve in fluid communication with each of the decontamination basin, the disinfectant storage reservoir, and the primary pump, wherein the disinfection valve is configured to transition between a circulation state and a collection state, wherein the disinfectant storage reservoir is configured to collect the disinfectant from the primary pump in the collection phase for reuse while reprocessing the medical device.
 39. The apparatus of claim 38, wherein the disinfection valve in the circulation state is configured to direct the disinfectant from the primary pump and toward the decontamination basin in the circulation phase, and wherein the disinfection valve in the collection state is configured to direct the disinfectant from the primary pump and toward the disinfectant storage reservoir.
 40. The apparatus of claim 38, further comprising: (a) a neutralization valve in fluid communication with the decontamination basin and the disinfectant pump, wherein the neutralization valve is configured to transition between a basin state and a neutralization state; and (b) a neutralization tank fluidly connected to the neutralization valve and configured to neutralize the disinfectant received therein, wherein the neutralization valve in the basin state is configured to direct the disinfectant from the disinfectant pump toward the decontamination basin, and wherein the neutralization valve in the neutralization state is configured to direct the disinfectant from the disinfectant pump toward the neutralization tank for collection therein. 